I have to check my receipt but the second round of shipping the cost was between 5.20-5.80 eahc and that was becuase of the use of a BOX.  If shipped with an envelope it is 3.00.  I think the receipt is in my car at the airport, I will send emails out when i can get to the receipt.  I am going to try and make them all envelopes in the future shipments to avoid the added cost.